$1 in 1646 is equivalent in purchasing power to about $0.75 in 1647.
The dollar had an average **deflation** rate of -25.45% per year since 1646, producing a cumulative price change of -25.45%.
Purchasing power *increased* by 25.45% in 1647 compared to 1646. On average, you would have to spend 25.45% *less* money in 1647 than in 1646 for the same item.
This is an example of **deflation**.

This means that prices in 1647 are 25.45% lower than average prices since 1646, according to the Bureau of Labor Statistics consumer price index.

The 1646 inflation rate was -37.50%. The inflation rate in 1647 was -25.45%. The 1647 inflation rate is lower compared to the average inflation rate of 1.13% per year between 1647 and 2021.

Inflation rate is calculated by change in the consumer price index (CPI). The CPI in 1647 was 4.10. It was 5.50 in the previous year, 1646. The difference in CPI between the years is used by the Bureau of Labor Statistics to officially determine inflation. Because the 1647 CPI is less than 1646 CPI, negative inflation (also known as deflation) has occurred.

⌃

Average inflation rate | -25.45% |

Converted amount ($1 base) | $0.75 |

Price difference ($1 base) | $-0.25 |

CPI in 1646 | 5.500 |

CPI in 1647 | 4.100 |

Inflation in 1646 | -37.50% |

Inflation in 1647 | -25.45% |

$1 in 1646 | $0.75 in 1647 |

CPI is the weighted combination of many categories of spending that are tracked by the government. Breaking down these categories helps explain the main drivers behind price changes. This chart shows the average rate of inflation for select CPI categories between 1646 and 1647.

Compare these values to the overall average of -25.45% per year:

Category | Avg Inflation (%) | Total Inflation (%) | $1 in 1646 → 1647 |
---|---|---|---|

Food and beverages | 0.00 | 0.00 | 1.00 |

Housing | 0.00 | 0.00 | 1.00 |

Apparel | 0.00 | 0.00 | 1.00 |

Transportation | 0.00 | 0.00 | 1.00 |

Medical care | 0.00 | 0.00 | 1.00 |

Recreation | 0.00 | 0.00 | 1.00 |

Education and communication | 0.00 | 0.00 | 1.00 |

Other goods and services | 0.00 | 0.00 | 1.00 |

For all these visualizations, it's important to note that not all categories may have been tracked since 1646. This table and charts use the earliest available data for each category.

Our calculations use the following inflation rate formula to calculate the change in value between 1646 and 1647:

CPI in 1647
CPI in 1646

×

1646 USD value

=

1647 USD value

Then plug in historical CPI values. The U.S. CPI was 5.5 in the year 1646 and 4.1 in 1647:

4.15.5

×

$1

=

$1 in 1646 has the same "purchasing power" or "buying power" as $0.75 in 1647.

To get the total inflation rate for the 1 years between 1646 and 1647, we use the following formula:

CPI in 1647 - CPI in 1646CPI in 1646

×

100

=

Plugging in the values to this equation, we get:

4.1 - 5.55.5

×

100

=

Raw data for these calculations comes from the Bureau of Labor Statistics' Consumer Price Index (CPI), established in 1913. Inflation data from 1665 to 1912 is sourced from a historical study conducted by political science professor Robert Sahr at Oregon State University.

You may use the following MLA citation for this page: “Inflation Rate in 1647 | Inflation Calculator.” Official Inflation Data, Alioth Finance, 19 Oct. 2021, https://www.officialdata.org/inflation-rate-in-1647.

Special thanks to QuickChart for their chart image API, which is used for chart downloads.

in2013dollars.com is a reference website maintained by the Official Data Foundation.

Average inflation rate | -25.45% |

Converted amount ($1 base) | $0.75 |

Price difference ($1 base) | $-0.25 |

CPI in 1646 | 5.500 |

CPI in 1647 | 4.100 |

Inflation in 1646 | -37.50% |

Inflation in 1647 | -25.45% |

$1 in 1646 | $0.75 in 1647 |